function gosign() {
    var url = 'jump/goSignup';
    window.location.href = url;
}

//引入手机或电脑的css
var system ={};
var p = navigator.platform;
system.win = p.indexOf("Win") == 0;
system.mac = p.indexOf("Mac") == 0;
system.x11 = (p == "X11") || (p.indexOf("Linux") == 0);
var linkElement = document.createElement("link");
linkElement.rel = "stylesheet";
if(system.win||system.mac||system.xll){//如果是电脑跳转到
    linkElement.href = "/css/main/login.css";
}else{  //如果是手机,跳转到
    linkElement.href = "/css/main/loginmob.css";
}
document.head.appendChild(linkElement);